Finding the Third Proportional to 290,775 and 392,764.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,775 : 392,764.50 = 392,764.50 : x
2. Step 2: Convert to fraction form
   290,775/392,764.50 = 392,764.50/x
3. Step 3: Cross multiply
   290,775x = 392,764.50 × 392,764.50
4. Step 4: Simplify right side
   290,775x = 154,263,952,460.25
5. Step 5: Solve for x
   x = 154,263,952,460.25/290,775
6. Step 6: Final answer
   x = 530,526.88